Shearing-machine.



C. M. PALMER.

SHEARING MACHINE.

APPLICATION FILED JULY '27. 1908.

93 1, 1 41 Patented Aug. 17, 1909.

Eva 2X51 C UNITED j STATES PATENT OFFICE.

CHESTER M. PALMER, OF MONTGOMERY, ILLINOIS.

SHEARING-MACHINE.

To all whom "it may concern:

Be it known that I, CHESTER M. PALMER, a citizen of the United States, and a resident of Montgomery, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Shearing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to improvements in shearing machines and the invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims.

The object of the invention is to provide an improved construction for clamping the cutting knife on the comb, so arranged as to adjust the clamping pressure toward and from the points of the cutter teeth to properly apply the tension pressure to cutter teeth of different lengths and to teeth, the lower or cutting edges of which vary from a straight line contact with the comb.

In the drawings :Figure 1 is a plan view of a shearing machine made in accordance with my invention. Fig. 2 is a side elevation of the front end of the machine, showing parts in section. Fig. 3 is a perspective view of one of the clamping devices carried by the fork which transmits the tension pressure to the cutting knife. mentary plan view, partially in section, of another form of operating fork or lever, showing a modified form of clamping device carried thereby. Fig. 5 is a perspective View of the clamping device shown in Fig. 4:.

As shown in the drawings, 10 designates the frame or casing of the shearing machine, and 11 a tube attached to the rear end thereof and constituting a bearing for the driving shaft 12.

14 designates a horizontally vibratory cutter lever which is pivotally mounted on the machine in the usual manner, and to the forward end of which is connected the cutter 15 which reciprocates on the usual comb 16 attached to the frame or casing.

The foregoing parts of the machine may be made of any suitable or preferred construction so far as my invention is concerned, with the exception that the front end of the vibratory cutter lever shall be designed to receive the clamping devices to which the Specification of Letters Patent.

Application filed July 27, 1908.

Fig. 4 is a frag-' of the cutter teeth.

Patented Aug. 17, 1909.

Serial No. 445,470.

present invention relates. The said cutter lever is shown as formed at its forward end to provide the usual fork arms 17, 17 which are located over the body of the cutter. Said fork arms are connected with the cutter by means of screw studs 18, 18 which extend downwardly through openings in the ends of said fork arms and have screw-threaded engagement with said arms. studs extend downwardly beyond said arms for engagement with openings in the body of the cutter. The fork end of the cutter lever is pressed toward the cutter by a tension device mounted in the casing or frame, which embraces a tension screw 20, said tension screw acting upon the lever to press the forward or forked end of the same toward the cutter.

Referring now to the clamping devices by which the pressure of the tension device acting on the cutter lever is transmitted to the cutter, and the manner of mounting the same on the fork of the operating lever, said parts are made as follows: Said tension devices, which are designated as a whole by 22, each embraces a shank portion 23 and laterally separated presser fingers 24;, at, there being two of such fingers, as herein shown, arranged symmetrically with respect to said shank. Said presser fingers bear upon the upper faces of the teeth 25 of the cutter, there being two of such clamping devices and the cutter having four teeth. The shanks of said clamping devices extend rearwardly through horizontal, rearwardly extending apertures 26 near the outer ends of the fork arms. The said clamping devices are adapted for adjustment on the fork arms to move the presser finger 2 1 toward and from the fork arms, and to thus apply the pressure transmitted through the presser fingers at the proper points in the length As herein shown, the adjustment of the clamping devices is efiected by providing the rearwardly-extending shanks thereof with screw-threaded portions 27 which engage screw-threaded apertures formed in the operating lever. As shown in Figs. 1 to 3, inclusive, the said shanks 28 are elongated and extend rearwardly through screw-threaded apertures 28 formed in lugs 29, 29 which extend laterally from the operating lever in rear of the fork arms 17. The screw-threaded portion of said shanks are made of such length as to permit the proper range of adjustment of the clamping The said screw wardly on the cutter teeth, the tensiondeviceis released so as to permit the cutter lever to be raised upwardly a sufficient distance to allow the presser fingers of the clamping devices to be rotated free'ofthecomb. After the desired adjustment has been effected and the presser fingers are clamped upon the cutter teeth, the said clampingdev-ices are held or. locked from rotation in their positions of adj ustment.

I11 the, construction shown in Figs. 4 and 5, the clamping devices, designated thereinv as 31, are provided with shorter. shanks 32iwhich are screw-threaded throughout their length,- and the openings in the. forkarms l7 rearwardly through which the said shanks. extend. are screw-threaded so that said clamping devices have direct screwthreaded connection with the fork arms themselves. The presser fingers 33 orthe: clamping-devices, shown in Figs. 4 and 5, bear upon the. teeth ofthe cutter in-the same manner. as do. the presser fingers of the: clamping devices before described;

The purpose of providing the adjustment for said clamping. devices is to enable the; pressure transmittedto the cutter through the presser fingers to be applied to the cutter; teeth at the proper points in the length thereof, notwithstanding the shortening of the teeth due to wear andregrinding; it being evident that as the cutter teeth are shortened by reason of such wear and grinding, itis desirable tov apply the tension pressure nearer. to the base of the teeth. It is also found that the cutting edges-of the. teeth which contact with. the. comb vary from a' straight line under certain conditions of; grinding the teeth to sharpen the same. Ihat is :to say, the grinding face of:agrinding stone may be of such. curvature as to.

.give a longitudinal concave line to the cutting edges ofthe teeth. Inthis event it is desirable that'the pressure be applied to such pointson the teeth as toflatten the teeth against the comb throughout. the length; thereof, and the device herein shown isadaptedito produce such adjustmentofthe teeth.

The structural details of the. invention herein shown may be varied within the spiriti of my. invention, and I do notlim-itthe invention to the illustrated details except as hereinafter made the subject of specific claims.

It will be observed that the clamping devicesare capable of a rocking motionrelatively to the lever whereby the tension .pressure on .the cutter maybe equalized.

I claim as my invention 1. In a shearingmachine, the combinationwith a comb and a cutter arranged to vibrate thereon, of a tension device for pressing the cutter to the comb embracing means for adjusting the pressure of the tension device to different points in the length of the cutter teeth.

2.. Idashearing machine, the combination with a vibratory cutter lever, clamping devices ca-rri-edthereby for engagement with 'the teeth of a cutter, and means for adjusting the clampingadevices longitudinally of the, cutter lever.

3: In a shearing machine, .the combination with. a cutter. lever; and. clamping devices carried lt'hereby, adapted forengagem entwitlr the clutter. and. having screw-threaded connection. with the. said. lever, permitting adj ustment of. the clamping devices longitudinally ofthe vibratory lever.

4e. Inn shear-ing machine, the combination i i with acomb, a cutter; movable 011 the comb and a vibratory cutter lever, of clamping devices carried by the cutter leverand adaptedfor engagement with the teeth of the cutter, and meansv for, adjusting sa-id clamping devices longitudinally. of the teeth, of the cutter.

5. Ina shearing machine, the combination with a, comb, a cutter movable on the comb,

.and a vibratory cutterlever interlocked with the cutter for. reciprocating the latter, of a clamping device. carriedby the cutter. lever :embracing' a shank. portion having screwthreaded connection with the cutter lever,

and presser fingers adaptedfor engagement 1 with the teeth of the cutter at longitudinally separated points 7 on the teeth.

' (3. Inaishearingmachine, the combination with a comb, a cutter movable on the comb,

a-nda vibratory. cutten lever provided with forkarms which. are interlocked with, the cutter, of clamping devices comprising shanks which extend rearwardlythrough apertures in said: fork arms and having screw-threaded engagement with saidcutter lever, and provided at their forward ends with presser fingers adapted for contactwith .the teeth of the cutter at longitudinally separated pointson the teeth.

7. Ion shearing machine, the combination with zucomb, .a cutter. movable on the comb, and avibratory cutter lever. provided with gfork, arms, .said' fork arms being provided with studs which interlock with the cutter,

ofJclaanping devices carried by the lever. for

engagement with the cutter. teeth. and adjustable on the lever relatively to'the cutter. 8; .In a shearing machine, .the combination with a comb, acutter movable on the comb and a vibratoryicutter lever, of clamping devices carried bythe. cutter lever; and adapted for engagement with the teeth of the cutter and capable of a rocking-motion relatively :to the le-ver ,.and means for adjusting said clamping devices longitudinally. of the teeth ,of the cutter.

9. In a shearing machine, the combination with a comb and a cutter arranged to Vibrate thereon, of a tension device for pressing the cutter upon the comb, embracing means for exerting the tension pressure at different points in the length of the teeth and constructed to equalize the pressure on the cutter from side to side thereof.

In testimony, that I claim the foregoing as my invention I afiiX my signature in the 10 presence of two Witnesses, this 24th day of July A. D. 1908.

CHESTER M. PALMER.

Vitnesses VILLIAM L. HALL, GEORGE E. \VILKiNS. 

